作者:Ana C. Allepuz、Ramón Badorrey、MarÃa D. DÃaz-de-Villegas、José A. Gálvez
DOI:10.1002/ejoc.200900828
日期:2009.12
The asymmetric synthesis of (2S,3R)-2-amino-3-octanedecanol hydrochloride (ES-285·HCl) was achieved in eight steps in ca. 38 % overall yield from the N-benzylimine-derived from (R)-2,3-O-isopropylidene glyceraldehyde, which is easily available on gram scale from the inexpensive precursor D-mannitol. Highly diastereoselective addition of methylmagnesium bromide to the N-benzylimine was the key step
(2S,3R)-2-amino-3-octanedecanol 盐酸盐 (ES-285·HCl) 的不对称合成在大约 8 个步骤中完成。来自 (R)-2,3-O-异亚丙基甘油醛的 N-苄亚胺的总产率为 38%,它很容易从廉价的前体 D-甘露醇以克规模获得。将甲基溴化镁高度非对映选择性地添加到 N-苄亚胺中是创建具有适当构型的 vic-氨基醇部分的关键步骤。中间体氨基环氧化物的区域选择性开环能够在 C4 处引入长烃链。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)